Chimney cover



FIG. 1 is a top perspective view of a chimney cover, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image of that shown; and

FIG. 4 is a top perspective view of a chimney cover showing a second embodiment of my new design, it being understood that the sole difference resides in the shape of the cover being rectangular. 

The ornamental design for a chimney cover, as shown and described. 